Brother MFC-9420CN - Improving Print Quality

Confidential
5-50
5.1.37 Developer Gear PU / Developer Drive ASSY PU
(1) Remove the washer (4 places) fixing the developer gear PU to the shaft.
(2) Remove the developer gear PU (4 places) from the inside of the frame.
(3) Remove the setscrew (BT3x8, 4 pieces) of the developer drive ASSY PU.
(4) Remove the developer drive ASSY PU from the frame.
Fig. 5-82
5.1.38 OPC Drive Gear ASSY PU
(1) Remove the setscrew (BT4x10, 4 pieces) of the OPC drive gear ASSY PU.
(2) Remove the OPC drive gear ASSY PU from the frame.
Fig. 5-83
Frame
Developer drive
A
SS
Y
PU
BT3x8
BT3x8
Developer gear PU
Developer gear PU
Washe
r
Frame
OPC drive gea
r
A
SSY PU
BT4x10